Manufacture of filaments for illuminating and heating purposes.



G. MIGHAUD & E. DELASSON. MANUFACTURE ,QYEZJFILAMENTS FOR ILLUMINATING AND HEATING PURPOSES.

I APPLICATION FILED MAYB, 190s. 972,893. Patented Oct. 18, 1910.

- and EUGENE DELASSON, citizens of the Reconverted into 5 5 Oxid of thorium 93 Oxid of cerium 1 95 Oxid of lucinum 1 100 Oxidofa uminium 4 Silicate of aluminium 1 5 Oxid of chromium (traces) oxids may be replaced by anyone of the .ters Patent hereln before referred to, the

U ITED STATES MANUFACTURE OF FILAMEN'TS FOR ILLUMINATING AND HEATING PURPOSES.

To all tuhom it may concern:

Be it known that we, Gnomes MIGHAUD public of France, and residents of Mom treuil-sous-Bois, Seine, France, have invented certain new and useful Improvementsin the Manufacture of Filaments for Illuminating and Heating Purposes, of which the following is a specificatlon.

We have disclosed in the specification forming a part of our application for Letters Patent, Serial No. 399,963, filed October 30, 1907, the composition of and the process for manufacturing refractory filaments to be used for incandescent gas lightmg. I

The invention forming the subject matter of the present application for Letters Patent, relates to certain modifications in the proportions of the primary material constituting the said filaments; and it also embodies im rovements in the method of treating the aments.

A ty ical'ratio for the quantities used of the ra iant substances which produces good results, is as follows:

This example of the composition of the filament is given for the purposeof showing how the prpportions may vary while the' materials selected remain the same.

It should be understood that each of these oxids of the same series, or by a mixture of several oxids of the same series. Thus, the oxid of aluminium might be replaced by the oxids of silicon, of magnesium, or of calcium either separately or mixed together, and under the same "conditions, the oxids of thorium and of glucinum miht be replaced by' the oxids of cerium, o zirconium, of erbium or others of the series, either separately or mixed together.

As is indicatedin the specification forming part of our prior application for Letmaterials are ag lutinated into a past mass, aments by means 0 draw, plates or nozzles and subjected to a baking Specification. of Letters Patent.

action. This latter operation, however, 1n

Patented Oct. 18, 1910.

Application filed May 6, 1908. Serial No. 431,204.

accordance with the present invention, comprises two periods, which entails a modification of the means originally devised.

The accompanying drawing shows partly in elevation and partly in section the novel device adapted for the fusion of the filaments.

Referring particularly to the drawing, E represents a nozzle into which the agglutinated material is placed, and. from the lower end of which it is pressed in the form of a filament D. Below the nozzleE is the chamber F in which two or more oxyhydrogen blow-pipes G converge, the pipes H and 0 connecting with sources of hydrogen and oxygen supply, respectively. The filament D on leaving the nozzle E is therefore subjectedto the action of these convergent oxyhydrogen flames and is there fused for the first t1me (or the fusion is initiated) then, continuing its movement, it enters an electric furnace, A, and is protected by the infusible tube C of'carborundum and when in proximity to the electric arc, it attains a pasty condition of fusion-which insures the perfect refining of the material. This novel arrangement, which is herein disclosed, in connection with a vertical furnace, is also obviously applicable to furnaces of other types, the oxyhydrogen blow-pipes being placed between the outlet of'the nozzles and' the electric arc.

In the rior application referred to, we have descrlbed black soap as the agglutinant, and in addition thereto, it may now be stated, that among the substances which will fulfil the same purpose, an agglutinant composed of 9 parts of arabin, and 1 part of ammonia soap can successfully be employed.

We claim:

1. The process of manufacturing incandescing filaments, which consists in agglomerating material, forming the sameinto a I filament, subjecting said filament to the action of a gaseous flame whereby an in tial fusion'is produced, and afterward Sl1b180i'r" ing said filament to the heat from an electric arc.

- 2. The process of manufacturing incandescing filaments,,which consists in agglomerating material, forming the same into a filament, subjecting said. filament to an oxyhydrogen flame, and afterward subjecting said filament to the heat from an electric arc.

3. A filament comprising oxid of thorium, 'oxid of cerium, oxid of glucinum, oxid of of aluminium. v

ninety-three parts oxid' of thorium, one part 4:. A filament comprising a plurality of radiant materials, and an agglutinant composed of arabin and ammoma soap.

5. A filament comprising a plurality of radiant materials, and an agglutinant composed of substantially nine parts of arabin and one art of ammonia soap.

6. A lament comprising substantially oxid of cerium, one part oxid of glucinum, four parts oxid of aluminium, and one part silicate of aluminium.

In testimony whereof we afiix our signa- 15 tures in presence of two, witnesses.

GEORGES MICHAUD. EUGENE DELASSON.

Witnesses MILTON BRAIN, VICTOR MONTRAY. 

